Boot lock does not need power to operate, although the switch does (obviously)
Have you tried using the key in the boot lock? I think that someone has suggested the that the boot is open, but the lock is shut. Unlock it with the key, and you may be good to go.
Otherwise, where are you based? I'm sure any of the more mechanically minded members would happily take a look. I'd be happy to have a poke if it would help. I'm quite familiar with the gubbins having installed remote opening on mine.
C